J.P. Instruments EDM 760 Pilots Guide - Manual (Page 15)

Shock Cooling -30
-40
CLD
CLD
Dot indicates fastest
cooling cylinder
The display will pause at each measurement for four seconds in the
Automatic indexing mode. (The four second indexing rate can be changed.
See “Pilot Programming” on page 37.) In the Manual indexing mode, tap
the STEP button to advance to next measurement. Only the
measurements for the options that are installed will be displayed;
uninstalled measurements will not appear.
Section 3 - Operating Procedures
Diagnostic Testing on Startup and During Flight
When your EDM-760 is first turned on, all digits light up for a few
seconds, permitting you to check for non-functional segments. Then each
column is self-tested in sequence while the EDM-760 tests internal
components, calibration and integrity of the probes. If a problem is found,
it will be displayed as
OPEN PRB or CAL ERR, followed by the name
of the probe or channel. During flight, probes are constantly checked for
inconsistent or intermittent signals. A faulty channel or probe encountered
during start-up or during flight will be deleted from the sequence,
producing a missing column or blank digital data.
Modes
The EDM-760 has three different operating modes: Automatic indexing,
Manual indexing and LeanFind. When you first turn on the power the
EDM-760 starts in the Manual indexing mode, but will enter the
Automatic indexing mode after a few minutes. The Automatic indexing
mode provides you with engine monitoring information for the majority of
flight conditions. To adjust the mixture, use the LeanFind mode. And to
display specific measurements, use the Manual indexing mode. In both the
Automatic and Manual indexing modes the analog display shows a bar
graph of EGT and CHT for each cylinder and the TIT, if installed (or Oil
temperature, if it is installed and TIT is not installed).
For Your Safe Flight Page 11